    establish metadata structure."
   []
   (boot/with-pre-wrap fileset
-    (let [updated-files (add-filedata (boot/user-files fileset))]
+    (let [updated-files (->> fileset
+                             boot/user-files
+                             add-filedata
+                             (trace :perun/base))]
       (perun/set-meta fileset updated-files))))
 
 (def ^:private images-dimensions-deps

                                            (perun/report-info "collection" "rendered collection %s" page)
                                            new-entry)))
                                      grouped-files))
                    updated-files    (apply conj files new-files)
                    updated-fileset  (perun/set-meta fileset updated-files)]
                  (commit updated-fileset tmp))))))


  (let [pod (create-pod ttr-deps)]
    (boot/with-pre-wrap fileset
      (let [files         (perun/get-meta fileset)
            updated-files (trace :perun/word-count
                                 (pod/with-call-in @pod
                                   (io.perun.word-count/count-words ~files)))]
        (perun/report-debug "word-count" "counted words" (map :word-count updated-files))
        (perun/set-meta fileset updated-files)))))

